Ioun Bond

Prerequisite(s) You must have chosen a bonded object as your arcane bond to select this discovery.

Benefit(s) You can form an arcane bond with an ioun stone. If you choose this arcane discovery at 1st level, you gain a dull gray ioun stone as a bonded object at no cost. A bonded ioun stone must be orbiting your head to have effect. At 12th level, you can turn a bonded dull gray ioun stone into another kind of ioun stone as if you possessed the Craft Wondrous Item feat; if you die or replace a bonded ioun stone that has been transformed in this way, the stone reverts to a dull gray ioun stone.